Well, if you are going with the ZDDac, then I'd avoid the harder to drive HiFiMan cans.
But I am not sure where the problem is.
If the Cable Company carries headphones in the price range you are looking at in their Lending Library, I'd take advantage of that. Headphones are light and cheap to ship, so I'd find a way to try some out if you can find a way.
Audition, Audition, Audition. You can use HeadFi etc to narrow down the choices. A'gon forums are great for a lot of things, but HeadFi is the king of headphone forums. Some Looong threads tho.
But I am not sure where the problem is.
If the Cable Company carries headphones in the price range you are looking at in their Lending Library, I'd take advantage of that. Headphones are light and cheap to ship, so I'd find a way to try some out if you can find a way.
Audition, Audition, Audition. You can use HeadFi etc to narrow down the choices. A'gon forums are great for a lot of things, but HeadFi is the king of headphone forums. Some Looong threads tho.